TY - JOUR
T1 - Microstructure and mechanical properties of laser forming repaired 17-4PH stainless steel
AU - Lin, Xin
AU - Cao, Yongqing
AU - Wu, Xiaoyu
AU - Yang, Haiou
AU - Chen, Jing
AU - Huang, Weidong
PY - 2012/9/15
Y1 - 2012/9/15
N2 - The microstructure and microhardness of laser solid formed (LSFed) and laser forming repaired (LFRed) 17-4PH stainless steel were investigated. The mechanical properties of LSFed 17-4PH stainless steel and laser forming repaired (LFRed) 17-4PH stainless steel with the volume fraction of laser deposited zone (LDZ) of 5%, 30% and 60%, respectively, were also examined. The interface between the substrate and LDZ presented a compact metallurgical bonding. There existed the uniform distribution for the major elements of 17-4PH stainless steel, such as Fe, Cr, Ni, Cu, from the substrate to the LDZ. The microstructure of the LDZ consisted of martensite laths and a small amount of precipitation strengthening phase particles, such as M7C3 and NbC carbides. The microstructure of heat affected zone (HAZ) and the substrate mainly consisted of the ferrite strips and martensite laths. The hardness and tensile strength of the LDZ are higher than those of the wrought substrate, and its reduction of area is slightly lower than that of the wrought. The comprehensive mechanical properties of LSFed and LFRed 17-4PH stainless steel were equivalent with those of the wrought.
AB - The microstructure and microhardness of laser solid formed (LSFed) and laser forming repaired (LFRed) 17-4PH stainless steel were investigated. The mechanical properties of LSFed 17-4PH stainless steel and laser forming repaired (LFRed) 17-4PH stainless steel with the volume fraction of laser deposited zone (LDZ) of 5%, 30% and 60%, respectively, were also examined. The interface between the substrate and LDZ presented a compact metallurgical bonding. There existed the uniform distribution for the major elements of 17-4PH stainless steel, such as Fe, Cr, Ni, Cu, from the substrate to the LDZ. The microstructure of the LDZ consisted of martensite laths and a small amount of precipitation strengthening phase particles, such as M7C3 and NbC carbides. The microstructure of heat affected zone (HAZ) and the substrate mainly consisted of the ferrite strips and martensite laths. The hardness and tensile strength of the LDZ are higher than those of the wrought substrate, and its reduction of area is slightly lower than that of the wrought. The comprehensive mechanical properties of LSFed and LFRed 17-4PH stainless steel were equivalent with those of the wrought.
KW - 17-4PH stainless steel
KW - Laser forming repairing
KW - Laser solid forming
KW - Mechanical properties
KW - Microstructure
UR - http://www.scopus.com/inward/record.url?scp=84863783968&partnerID=8YFLogxK
U2 - 10.1016/j.msea.2012.05.095
DO - 10.1016/j.msea.2012.05.095
M3 - 文章
AN - SCOPUS:84863783968
SN - 0921-5093
VL - 553
SP - 80
EP - 88
JO - Materials Science and Engineering: A
JF - Materials Science and Engineering: A
ER -